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    I see what you mean.  It appears to be intentional, since there is
    code here [1] that explicitly replaces the GetInput function with
    the value of the passed parameter.<br>
    <br>
    At a minimum it might make sense to only replace the function with
    the parameter value if the parameter is not None.<br>
    <br>
    I don't there is a way to provide input values to the ToscaTemplate
    object after it has been created, so I don't know how any "future"
    input values would be handled.<br>
    <br>
    Is there a specific scenario you want to support that requires this?<br>
    <br>
    Thanks<br>
    <br>
    Bob<br>
    <br>
    <br>
    [1] -
<a class="moz-txt-link-freetext" href="https://github.com/openstack/tosca-parser/blob/master/toscaparser/topology_template.py#L282">https://github.com/openstack/tosca-parser/blob/master/toscaparser/topology_template.py#L282</a><br>
    <div class="moz-cite-prefix">On 12/17/18 4:45 PM, Michael Still
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAEd1pt4ARRvcakxrsiW_UkshGC38WMFysSPAOZGBb47Q59TbtQ@mail.gmail.com">
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      <div dir="ltr">In my mind (and I might be wrong), the
        inconsistency is that for properties, interfaces and outputs if
        the value parsed is a reference to something else I get a
        function which will resolve the value if I ask it nicely.
        However for capabilities, I instead get None unless I have
        passed in parsed parameters. This is despite the functions code
        supporting get_input.
        <div><br>
        </div>
        <div>The issue with parsed parameters is I now need to run the
          parser twice -- the first run to detect what the inputs are,
          and then the second to provide values for those so that the
          substitution occurs. That seems like a confusing user
          interface to me.</div>
        <div><br>
        </div>
        <div>Michael</div>
        <div><br>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr">On Tue, Dec 18, 2018 at 9:35 AM Bob Haddleton
          <<a href="mailto:bobh@haddleton.net" moz-do-not-send="true">bobh@haddleton.net</a>>
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div bgcolor="#FFFFFF"> I'm not sure where the inconsistency
            is?  Can you elaborate?<br>
            <br>
            You can get the inputs from the tosca.inputs attribute
            without passing any input parameters:<br>
            <br>
            tosca = ToscaTemplate(sys.argv[1])<br>
            <br>
            print([<a href="http://input.name" target="_blank"
              moz-do-not-send="true">input.name</a> for input in
            tosca.inputs])<br>
            <br>
            ['cpus', 'db_name', 'db_user', 'db_pwd', 'db_root_pwd',
            'db_port']<br>
            <br>
            <br>
            Bob<br>
            <br>
            <div class="gmail-m_8559250796182448623moz-cite-prefix">On
              12/17/18 1:22 PM, Michael Still wrote:<br>
            </div>
            <blockquote type="cite">
              <div dir="ltr">Thanks for that.
                <div><br>
                </div>
                <div>That approach seems fair enough, but inconsistent
                  with how other things are represented as functions.
                  How am I meant to know what the inputs to the CSAR are
                  before the CSAR is parsed?</div>
                <div><br>
                </div>
                <div>Michael</div>
                <div><br>
                </div>
                <div><br>
                </div>
              </div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr">On Tue, Dec 18, 2018 at 1:28 AM Bob
                  Haddleton <<a href="mailto:bobh@haddleton.net"
                    target="_blank" moz-do-not-send="true">bobh@haddleton.net</a>>
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0px 0px
                  0px 0.8ex;border-left:1px solid
                  rgb(204,204,204);padding-left:1ex">
                  <div bgcolor="#FFFFFF"> Hi Michael:<br>
                    <br>
                    tosca-parser expects that the input values will be
                    defined already and passed to the ToscaTemplate
                    object in the parsed_params argument.<br>
                    <br>
                    If you change:<br>
                    <br>
                    tosca = ToscaTemplate(sys.argv[1])<br>
                    <br>
                    to:<br>
                    <br>
                    tosca = ToscaTemplate(sys.argv[1],
                    parsed_params={'cpus': 4})<br>
                    <br>
                    the output becomes:<br>
                    <br>
                    Processing node template server<br>
                      disk_size: 10 GB<br>
                      num_cpus: 4<br>
                      mem_size: 4096 MB<br>
                      architecture: x86_64<br>
                      type: Linux<br>
                      distribution: Fedora<br>
                      version: 18.0<br>
                      min_instances: 1<br>
                      max_instances: 1<br>
                      secure: True<br>
                    <br>
                    <br>
                    Hope this helps.<br>
                    <br>
                    Bob<br>
                    <br>
                    <br>
                    <div
class="gmail-m_8559250796182448623gmail-m_2800331163805999778moz-cite-prefix">On
                      12/17/18 3:25 AM, Michael Still wrote:<br>
                    </div>
                    <blockquote type="cite">
                      <div dir="ltr">
                        <div dir="ltr">
                          <div dir="ltr">Hi,
                            <div><br>
                            </div>
                            <div>I'm trying to use tosca-parser to parse
                              CSAR files. Its working quite well, until
                              I hit a wall with capabilities today.
                              Specifically I am testing with the single
                              instance wordpress example CSAR, which
                              uses a get_input for the num_cpus argument
                              for host capabilities for the server.</div>
                            <div><br>
                              Based on how properties work, I would
                              expect to get a function back for anything
                              which requires referencing another value,
                              but in the case of capabilities I either
                              get the hardcoded value (strings, ints
                              etc), or a None for values which would be
                              functions if we were talking about
                              prototypes.</div>
                            <div><br>
                            </div>
                            <div>Here's a snippet of example code:</div>
                            <div><br>
                            </div>
                            <div>
                              <div>#!/usr/bin/python</div>
                              <div><br>
                              </div>
                              <div>import sys</div>
                              <div><br>
                              </div>
                              <div>from jinja2 import Template</div>
                              <div>import toscaparser.functions</div>
                              <div>from toscaparser.tosca_template
                                import ToscaTemplate</div>
                              <div><br>
                              </div>
                              <div>tosca = ToscaTemplate(sys.argv[1])</div>
                              <div><br>
                              </div>
                              <div>for nodetemplate in
                                tosca.nodetemplates:</div>
                              <div>    print</div>
                              <div>    print('Processing node template
                                %s'% <a href="http://nodetemplate.name"
                                  target="_blank" moz-do-not-send="true">nodetemplate.name</a>)</div>
                              <div><br>
                              </div>
                              <div>    capabilities =
                                nodetemplate.get_capabilities_objects()</div>
                              <div>    for cap in capabilities:</div>
                              <div>        propobjs =
                                cap.get_properties_objects()</div>
                              <div>        if not propobjs:</div>
                              <div>            continue</div>
                              <div><br>
                              </div>
                              <div>        for po in propobjs:</div>
                              <div>            print('  %s: %s' %(<a
                                  href="http://po.name" target="_blank"
                                  moz-do-not-send="true">po.name</a>,
                                po.value))</div>
                            </div>
                            <div><br>
                            </div>
                            <div>Which returns this:</div>
                            <div><br>
                            </div>
                            <div>
                              <div>$ python _capabilities.py
                                csar_wordpress.zip </div>
                              <div>No handlers could be found for logger
                                "tosca.model"</div>
                              <div><br>
                              </div>
                              <div>Processing node template wordpress</div>
                              <div>  network_name: PRIVATE</div>
                              <div>  initiator: source</div>
                              <div>  protocol: tcp</div>
                              <div>  secure: False</div>
                              <div><br>
                              </div>
                              <div>Processing node template webserver</div>
                              <div>  network_name: PRIVATE</div>
                              <div>  initiator: source</div>
                              <div>  protocol: tcp</div>
                              <div>  secure: False</div>
                              <div>  secure: True</div>
                              <div><br>
                              </div>
                              <div>Processing node template mysql_dbms</div>
                              <div><br>
                              </div>
                              <div>Processing node template
                                mysql_database</div>
                              <div><br>
                              </div>
                              <div>Processing node template server</div>
                              <div>  secure: True</div>
                              <div>  min_instances: 1</div>
                              <div>  max_instances: 1</div>
                              <div>  mem_size: 4096 MB</div>
                              <div>  num_cpus: None</div>
                              <div>  disk_size: 10 GB</div>
                              <div>  distribution: Fedora</div>
                              <div>  version: 18.0</div>
                              <div>  type: Linux</div>
                              <div>  architecture: x86_64</div>
                            </div>
                            <div><br>
                            </div>
                            <div>I would expect num_cpus for the
                              "server" node_template to be a GetInput()
                              function based on its definition in the
                              CSAR, but instead I get None.</div>
                            <div><br>
                            </div>
                            <div>Is there an example somewhere of how to
                              correctly access functions for
                              capabilities?</div>
                            <div><br>
                            </div>
                            <div>Thanks,</div>
                            <div>Michael</div>
                          </div>
                        </div>
                      </div>
                    </blockquote>
                    <br>
                  </div>
                </blockquote>
              </div>
            </blockquote>
            <br>
          </div>
        </blockquote>
      </div>
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